Ventilator



Feb., M, 39%. F. A. STRAWSINE VENTILATOR Filed Feb. 13, 1955 2 Sheets-Sheet l F. A, STRAWSINE 2,930,55H`

VIENTILATOR Filed Feb. 13, 193s 2 sheets-sheet 2 Patented Feb. 1l, 1936 UNITED STATES PATENT OFFICE 6 Claims.

The invention relates to ventilators and has for some of its objects to provide a ventilator which is constructed to operate automatically to secure substantially uniform Ventilation; to provide a ventilator which is so constructed that its operation may be positively controlled; and to provide a ventilator having its vanes so constructed that air passing inwardly therethrough is directed upwardly and also having its vanes so constructed .that they have laterally spaced overlapping contacting portions and air chambers between these contacting portions when in closed position. Other objects are to so construct the ventilator that it may be readily inserted in or removed from the window guideway of the window frame and that it may have eiective weathering engagement with the window frame or the window, or both, when in place; to so construct the ventilator that it may be mounted inside the path of movement of the window and that it may cooperate with the bottom rail of the window when opened, so that air passing through the window opening must pass through the ventilator; and to so construct the ventilator that a screen may be readily mounted on and form a unit with the ventilator.

These and other objects of the invention will become apparent from the following description, taken in connection with the accompanying drawings, in which Figure 1 is a perspective view of a ventilator showing an embodiment of my invention and mounted in a window frame, which is partly broken away;

Figure 2 is a central vertical cross section through the ventilator, showing the parts in normal position;

Figure 2A is an enlarged section of a portion of Figure 2;

Figure 3 is a similar view showing the parts in closed position;

Figure 4 is a plan view of a portion of one of the vanes;

Figure 5 is a perspective view showing portions of one of the vanes and one of the supports therefor;

Figure 6 is a vertical section through an end portion of the ventilator;

Figure 7 is a cross section on Figure 6;

Figure 8 is a cross section on the line 8-8 of Figure 2;

Figure 9 is an inside elevation of a ventilator showing another embodiment of my invention;

Figure 10 is a perspective View of a portion of the line 1-1 of a ventilator showing another embodiment of my invention;

Figure 11 is a sectional view through an endk portion of this ventilator and a window frame engaged thereby;

Figure 12 is a view similar to Fig-ure 2, showing another embodiment of my invention;

Figures 13 and 14 are sections at right angles to each other showing another embodiment of my invention. l

In general, the ventilator embodying my invention may be used in various types of buildings, such as residences, public institutions, industrial institutions and poultry and stock buildings and so forth.

Referring to the embodiment of my invention shown in Figures 1 to 8 inclusive, I is the window frame and 2 is the window sliding in suitable guideways in the window frame. 3 is the ventilator which is mounted in the window frame and extends into the guideways below the window when raised. The frame of this ventilator has the upper and lower rails 4 and 5 respectively and the end rails or posts 6, which are rigidly secured to the upper and lower rails, all of the rails being preferably formed of sheet metal and hollow. 1 are the vanes of the ventilator preferably formed of sheet metal and pivotally mounted at their ends upon the ventilator frame. Each vane is Z-shaped and has a downwardly opening V- shaped portion and an upwardly opening V- shaped portion. The apex of the downwardly opening V-shaped portion is provided at its ends with the slots 8 which are adapted to receive the sheet metal vane supports 9, which are provided with the transverse slots I0 for receiving the portions of the apex adjacent the slots 8. The arrangement is such that each vane is pivotally mounted at its ends upon the vane supports and the ends of each vane extend closely adjacent to the end posts of the ventilator frame, the vane supports extending vertically and being xedly secured and forming part of the end posts.

The vanes 1 are so mounted that they have the downwardly extending portions Il outside their pivots and the upwardly extending portions I2 inside their pivots. Flnthermore, they are so mounted that they form zig-zag passageways for the air when in their normal or operative positions and their downwardly and upwardly extending portions respectively overlap when they are in their closed positions. The downwardly and upwardly extending portions are held from contact by means of strips of Asound deadening material I3, such as`felt, secured respectively to their lower and upper faces at their edges. Furthermore, when the vanes are in their closed positions they form, as shown particularly in Figure 3, the chambers I4 between their contacting portions, so that the ventilator is adapted to form a good heat insulator, especially since the upper and lower rails and the end rails or posts of its frame are hollow. The upper rail 4 has the recess l5 on its inner face so that the upwardly extending portion |2 of the uppermost vane when in closed position may extend closely adjacent to and the sound deadening material carried by this portion may contact with the inner face of the upper rail. The lower rail 5 has its outer face located so that the downwardly extending portion of the lowermost vane may in the closed position of the vanes extend closely adjacent to and the sound deadening material carried by this portion may contact with this face.

The vanes being freely pivotally mounted are adapted to swing automatically upon variation in pressure of the air current. For the purpose of compelling the vanes to move in unison, I have provided the tie rod I6 which is also preferably formed of a sound deadening material, such as wood. This tie rod extends vertically intermediate the ends of the vanes and is located at the inner side of the ventilator and pivotally mounted upon the U-shaped clips |1 which are secured to the upwardly extending portions I2 of the vanes. As shown more particularly in Figure 8, the clips embrace the tie rod and each clip is pivotally secured thereto by the hollow rivet I8 which extends through and tightly engages one arm of the clip and rotatably engages the tie rod and the solid rivet I9 which extends through the. other arm of the clip and the hollow rivet and is riveted thereto. The arrangement is such that the tie rod must always turn upon the hollow rivet. It will therefore be seen that the vanes operate together to automatically control the amount of air passing through the ventilator and that the vanes pro-vide substantially uniform Ventilation and prevent objectionable draft and also prevent the passage of rain or snow through the Ventilator.

For the purpose of positively controlling the operation of the ventilator, I have provided adjustable means engageable with the upper and lower ends of the tie rod and adapted to limit its movement and consequently the movement of the vanes. More particularly, 20 isa vertically extending sheet metal cover secured to the upper and lower rails of the ventilator frame and provided with the upper and lower longitudinally extending slots 2| and 22 respectively. 23 and 24 are adjustable sets, each comprising the bracket 25 within the cover and the nut 26 outside the cover and threadedly engaging a screw upon the bracket which extends through a slot in the cover. Each bracket carries the yieldable member 21 which is preferably formed o-f felt and which is engageable 'with an end of the tie rod. The arrangement is such that the movement of the tie rod in opposite directions and consequently swinging of the vanes in opposite directions may be limited by adjusting the studs so that, if desired, the vanes may be positively held in their open or closed positions, or may be limited in their swinging 'through any distance between their open and closed limits. In this connection, the construction is balanced so that the vanes normally occupy the positions shown in Figure 2.

To adapt the ventilator to window openings of different widths, I provide the slides 28 at opposite endsv of lthe ventilator and slidably engaging the end posts 6. Each slide is preferably formed of sheet metal and is channel-shaped and telescopes over the end post which is also channelshaped and for yieldably urging each slide away from its end post there are the coil springs 29 abutting the webs of the slide and the end post and secured to the former. For limiting the movement of each slide away from its end post, I provide upon the end post the hooked member 30 having a pair of resilient arms formed at their free end with the hooks 3| facing toward each other. I also provide the hooked member 32 upon the slide and having a pair of resilient arms formed at their free ends with the hooks 33 which face away from each other. The hooked members are preferably formed of sheet metal and furthermore the spacing of the hooks is such that upon assembling a slide with its end post the hooks 33 slide past the hooks 3|, after which these hooks return to their normal positions and engage. Sufficient clearance is provided between the ends of each slide and the end post to permit sucient flexing of the arms of the hooked member to first disengage one pair of hooks and then disengage the other pair of hooks. YThe slides are preferably provided with the handles 28 to facilitate collapsing to an extent to insert the ventilator into place.

Each end post and also each of the upper and lower rails ofthe ventilator frame is provided with the outwardly directed extension 34 and the widths of these extensions and particularly the extensions of the end posts is sunicient to completely close the downwardly opening V- shaped portions of the vanes when the latter are in their normal or operative positions.

35 is the yieldable weatherstripping preferably in the nature of sponge rubber having the body 36 for engaging the lower face of the lower rail 31 of the window 2 and the upper faces of the upper rail 4 and the slides 28 of the ventilator. 'Ihis weatherstripping has the lateral ilange portion 38 which is secured in the sheet metal clip 39, which latter has the base portion 40 laterally beyond the body 36 and fixed upon the upper face of the upper rail 4 and the return bent portion 40' clamping the flange portion 38 to the base portion. With this arrangement, `the yieldable weatherstripping is adapted to make continuous contact with both the window sash and the frame and end slides of the ventilator. v

In the modification shown in Figure 9, the ventilator is designed to be used in window openings of greater width and its frame is provided with the centre rail 4| so that the ventilator essentially comprises a pair of ventilators each of which is formed in the same manner as that above described.

The ventilator construction shown in Figures 10 and 11 is designed particularly for use with frame having metal weatherstripping or metal window frames and the lower rail 42 rof the ventilator frame has xedly secured to its lower face the channel-shaped metallic. weatherstripping 43. The outer face and the lower end of each slide 44 has xedly secured theretoy the channel-shaped metallic weatherstripping and 46 respectively, the latter having a width less than that of the weatherstripping 43 to telescopically engage therewithin. The weatherstripping 43,A 45 and 46 is arranged to intert with the metallic weatherstripping of the window frame.

Figure 12 discloses another modification in which the ventilator 41 is in general formed in the same manner as the ventilator illustrated in Figures 1 to 8 inclusive. However, this ventilator is designed to be located inside the path of movement of the window 48 and for the purpose of sealing the space between the ventilator frame and the lower rail 49 of the window when the latter is raised, I have provided the closure 50. This closure comprises the metal plate which is hinged upon the extension 52 of the upper rail of the ventilator frame and the yieldable weatherstrip 53 which is carried by the plate 50 and is engageable with the lower rail 49 of the window when the latter is raised. 54 is a suitable handle extending upwardly from the closure and adapted to be grasped to raise the closure to provide access to the handle upon the lower rail of the window or to provide for the entrance of air into the room, if desired.

As shown in Figures 13 and 14, the ventilator has the same construction as that illustrated in Figures l to 8 inclusive, but has secured thereto the screen 55 which is secured in a frame formed of the angle shaped members 56 which extend around and over the screen by the angle clips 51. These members and clips embrace and are clamped to the extensions 58 extending outwardly from the upper and lower rails and the end posts of the ventilator frame.

What I claim as my invention is:

1. In a ventilator, the combination with a Z-shaped vane, of bars at opposite ends of said vane and formed with notches through which said vane extends and for pivotal engagement with the end portions of the apex of one of the V-shaped portions of said vane.

2. In a ventilator, the combination with a Z- shaped vane having the apex of one of its V- shaped portions notched at both ends, of bars at opposite ends of said vane extending within the notches of said vane and notched to receive said apex adjacent the notches therein.

3. In a ventilator, the combination with a window frame having guideways for a window, a second frame, vanes mounted upon said second frame, relatively movable slides at the ends of said second frame, means tending to yieldably force said slides away from each other, and cooperating telescopically engaging weatherstripping upon said second frame and slides in nested engagement with said guideways.

4. In a ventilator, the combination with a frame having an opening, means within the opening and mounted upon said frame, said frame having a lateral outwardly opening channel-shaped end post, a channel-shaped member embracing and slidably engaging said end post, means extending within said end post and member for yieldably urging the latter away from the former, and cooperating resilient hooked members upon said end post and member and having pairs of hooks for limiting the movement of the latter away from the former, the hooks of each pair facing in opposite directions.

5. In a ventilator, the combination with substantially parallel bars, of Z-shaped vanes extending between said bars, each Vane having a downwardly opening V-shaped portion and an upwardly opening V-shaped portion and being pivotally connected to said bars'at the ends of the apex of the downwardly opening V-shaped portion, adjacent vanes being adapted to overlap each other in their closed positions.

6. In aA ventilator, the combination with a frame forming an opening, of vanes within the opening and pivotally mounted upon said frame, said vanes tending to close upon being subjected to an air current, means connected to said vanes for compelling the same to swing in unison, and means adjustable relative to and directly engageable with said rst mentioned means at points spaced longitudinally thereof for limiting the swinging of said vanes.

FERN A. STRAWSINE. 

